Electric current plug



- Nov. 17, 1931;

' c. L. BAUDRY DE SAUNIER ELECTRICCURRENT PLUG Filed June 18, 1929 Fig.8. v InvenZZr Clms Zoui-s Y {J wa g.

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Patented Nev. 17, 1931 UNITED STATES PATENT OFFICE CHABLES'LOUIS BAUDRY ml SAUNIEI Q, OF PARIS,

nmcrmo comm :enue- Application. flled June 18, 1929, Serial No. 371,792, and in France in], 8, 1928.

The present invention relates to an electric current plug.

Nearly all electric current plugs now on the market include a large. number of small 6 parts (screws, nuts, etc.) which are easily 'mislaid and which require, for fixing the wires on to their terminals, tools which are not always within reach (screwdrivers, span- ,ners, pliers, etc.). In other plugs, each pole is a metallic stud of socket or pin form,

screwed into an insulating holder and gripping between the end thereof and the inside of the insulating holder, the bared end of the conductor. I

These plugs areinore readily mounted than the preceding ones but they likewise require a tool for tightening up the studs, which must be done with considerable force in order to lock the studs and firmly grip the conducting wire. '7 1 In accordance with the present invention, the electrode may rotate freely in a cavity in the holder. into which protrudes the bared conducting wire which may 'thus be wound about the electrode in said cavity, said electrode being then looked in the holder by means of a nut'screwed on the end of the electrode and bearing against the holder.

For fixing the wire on the electfode, a hole is drilled transversely through the latter or clip said electrode is provided with a lateral ta The holder has a seat in which .a projec-v tion carried by the electrode is lodged to hold said electrode while the nut looking it in the holder is tightened up.

The invention will now be described with reference to the accompanying drawings which illustrates an embodiment thereof diagrammatically and by way of example.

In the drawings: 7 -Fig. 1 is an outside elevation of an electrode. Fig. 2 is a vertical section through the holder and the nut for assembling the electrode'in the holder.- 1,

Fig. 3 is a vertical section 01 process of assembly.

. Fig. 4 illustrates in similar manner the assembled plug pin.

the parts in Fig. 5 shows an outside elevation of a twopin plug accordin to the invention.

Fig. 6-is a simi ar view to that of Fig. 4, the electrode forming a socket.

Fig. 7 is a vertical section through a socke wherein is located a tab in which the end 0 the wire is wedged and Fig. 8 illustrates said socket in outside elevation and at 90 to the preceding figure.

The electrode is constituted by a stud made of conducting material and in the form of a pin or socket. In Fig. 1, said stud has been shown asa pin 1. v

Said stud 1 carries a pin 2, above which an opening 3 is drilled rightt rough the stud 1 which latter is screw-threaded at the top as at 4. k I

The pin is placed in a holder f insulating material, ebonite for example, illustrated in Fig. 2. In the base of said holder is formed an aperture 6 for the introduction of the stud 1 and has a transverse slot 7 in which the pin 2 can be lodged: a hole 8 is also provided in the side thereof; finally, a closure!) over the thread 4 of the metallic pin as illustrated in Fig. 4:. The diameter of'the in 1 is smaller than the inner diameter 0 the holder 5, whereby an inner chamber is formed enabling the wire to be wound on during assembly. To connect a cable to saidholder, the closure 9 is unscrewed to a certain extent so that the pin 2 may be taken out of the slot 71in which it lies. The hole 3 is practically facing the hole 8, the stud 1 is rotated by hand. to bring the hole 3 into register with the hole 8 and the bared end of the cable .11 is inserted into the hole 3. The stud '1 is rotated several times about. its axis so as to wind thereon a'certain quantity of cable 11 and thus prevent the end of the latter from slipping out of the opening 3 as a result of pulling on said cable. .The pin 2 is'then put bac into the slot 7 and the closure 9 screwed home until the stud is securely held in the holder as illustrated in Fig. 4; the wire can then no Cal longer become unfastened from the stud which can no longer rotate. It will thus be seen that notool isrequired in assembling and that no small parts which may easily fall or be mislaid, need be mounted or screwed. 1

its upper portion for the passage ofthe wire,-

two tenons 14 and 15, located at the lower end thereof,- are received in the slot 7 of the holder, the closure 9 again screws on to the upper portion of the socket and locks the latter in the holder as previously. a

In Figs. 7 and 8, there has been illustrated a similar socket but wherein instead of pro viding an opening extending right through the socket to take the bared end of the wire, there has been struck up from the socket a tab 16 in which the end of the wire can be wedged as has been illustrated in Fig. 8, the wire being wound several times about the socket as previously, to prevent it from becoming unwound.

The various details of the current plugs described above can of course be substantially modified. Thus other means may be provided for fixing the wire on the socket or electrode; just as it is possible to substitute round or hexagonal discs, cones, etc., for the pin 2 or the tenons 14 and 15.

In any case, as has been stated above; the

present invention consists in winding a wire about a stud forming a pin or socket. so as to fasten it to said stud, and then to lock said stud in its holder. The current plug thus formed is of very simple and absolutely dependable construction since the wires can be pulled without it being possible to free them from-the stud on which they are mounted and the contacts are as reliable as they can be with the conventional plugs.

It should be observed that with the wires reaching the plug from the side, as illustrated in Fig. 5, there is no tendency, as with the ordin ary plugs, to pull on the wire todraw the pins out of the sockets,a proceeding which little by little damages the portion of the wire fixed in the plug.

I claim:

1. In an electric current plug, the combination of a conducting stud, a holder adapted to accommodate said stud and allowing free rotation of said stud therein, a cable penetrating into said holder through an opening therein, means associated with said stud for receiving said cable in such position that sai cable can be coiled round said stud by rotating the latter in said holder, means for retaining said stud within said holder, and means operative for a predetermined position of said stud within said holder, for holding said stud against rotation.

2. In an electric current plug, the combination of a conducting stud, a holderadapted to accommodate said stud and allowing free rotation of said stud therein, a cable penetrating into said holder through an opening therein, means associated with said stud for receiving said cable in such position that said cable can be coiled round said stud by rotating the latter in said holder, and a tapped closure for one end of said holder into which said stud is adapted to screw.

- 3. In an electric current plug, the combination of a conducting stud, a holder ada ted to accommodate said studand allowing ree rotation of said stud therein, a cable penetrating into said holder through an opening therein, means associated with said stud for receiving said cable in such position that said cable can be coiled round said .stud b rotating the latter in said holder, a tappe closure for one end of said holder into which said stud is adapted to screw, a projection carried by said stud, and a seat formed in the opposite end of said holder to said closure and with which said projection may engage to prevent rotation thereof, said pin and closure thus cooperating to hold said stud fixed in said holder. F a

4. In an electric current plug, the combination of a conducting stud, a holder adapted to accommodate said stud and allowing free rotation of said stud therein, a cable penetrating into said holder through an opening therein extending substantially per pendicularl to said stud, and received in a hole in said stud, means for retaining said stud within said holder, and means operative for a predetermined position of said stud within said holder, for holding said stud against rotation. v

5. .In an electric current plug, the combination of a conducting stud, a holder adapted to accommodate said stud and allowing free rotation of said stud therein, .a cable penetrating into said holder through an opening therein extending. substantially perendicularly to said stud, and received in a ole assing substantially transversely throug said stud, and a tapped closure for one end of said holder into which said stud is adapted to screw.

6. In an electric current plug, the combination of a conducting stud, a holder adapted to accommodate said stud and allowing free rotation of said stud therein, a cable penetrating into said holder through an opening therein, and received in a hole in said stud, a tapped closure for one end of said holder into which said stud is adapted to screw, a projection carried by said stud, and a seat formed in the opposite end of said hblder to said closure and with which said projection may engage to prevent rotation thereof said pin and closure thus cooperating to hold said v stud fixed in said holder.

7. In an electric current plug; the combination of a conducting stud, aholder adapted to accommodate said stud "and allowing free rotation of said'stud therein, a cable penetrating into said holder through an opening therein; means associated with said stud for receiving said cable whereby saidL cable can be coiled round said stud by rotat ing the latter in said holder, a tapped closure for one end of said holder into which-said stud is adapted toscrew, a projection carried by said stud, and a seat formed in the opposite end of said holder to said closure and with which said projection may engage, said projection then extending through aslot formed in said ho1der,;and which prevents rotation of said proje tion.

CHARLES LOUIS BAUDRY'Io SAUNIER. 

